GreTritium Series Airbrush Combo Kits Double Action Airbrushes and Airbrush KitsAirbrushing Art Supplies prices and availability may vary from time to time. The inline top mounted paint cup offers well balanced handling and allows for optimal paint flow even when the airbrush is held at an angle. It is easy to clean and ideal for holding minute amounts of paint. The kit has 3 reservoirs 2 ml 1/20 oz 7 ml